CN109984795B

CN109984795B - Firing equipment

Info

Publication number: CN109984795B
Application number: CN201711473924.3A
Authority: CN
Inventors: 陈望东; 丁水澄
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2024-04-12
Anticipated expiration: 2037-12-29
Also published as: CN109984795A

Abstract

The invention discloses firing equipment which comprises a base frame, a first moving part, a limiting part, a second moving part, a linkage part and a reset mechanism. The firing equipment is initially in a triggerable state after the last firing; under the action of the linkage component, the rotating fulcrum of the operation component is converted into a first hinge point from a second hinge point, and the firing equipment is converted into a failure state from a triggerable state; under the effect of the reset mechanism, the rotating fulcrum of the operating part is converted into a second hinge point from a first hinge point, and the firing equipment is converted into a cockable state from a failure state, so that the firing equipment is alternately in the cockable state and the failure state, and the firing equipment cannot continuously perform twice firing, so that the firing equipment can be repeatedly utilized. In addition, before the firing equipment is used, the process of testing the firing of the firing equipment can be performed, and the reliability of the firing equipment is tested.

Description

Firing equipment

Technical Field

The invention relates to the technical field of medical instruments, in particular to firing equipment.

Background

The anastomat is used in medicine to replace traditional manual suturing equipment, and the current clinically used anastomat has the advantages of quick suturing, simple and convenient operation, few side effects and operation complications and the like, and is favored and appreciated by clinical surgeons at home and abroad. The anastomat is divided into a circular tube type anastomat, a linear type stapler, a cavity mirror anastomat and the like according to functions and structures, wherein the circular tube type anastomat is used for anastomosis of various cavity passages, two layers of cavity passage tissues are sutured together by striking staples into the cavity passage tissues, and meanwhile, an internally-arranged annular knife cuts off redundant tissues to form a circular anastomotic stoma, so that anastomosis of the cavity passages is completed. The method is mainly applied to anastomosis of the digestive tracts such as esophagus, stomach, intestine and the like, and anastomosis after circumcision and hemorrhoid circular cutting.

In order to prevent the anastomat from being continuously fired twice during the operation, an anti-secondary firing device is arranged in the anastomat disclosed in Chinese patent document CN1785127A, wherein the circular tube type binding instrument for the surgery comprises a binding instrument body, a binding head, a firing mechanism, a transmission adjusting mechanism and a safety mechanism. The firing mechanism comprises a handle and a shell which are fixedly connected with each other, the handle and the shell are hinged on the binding instrument body, a stop block is arranged in the shell, and a lug is arranged on the handle; the transmission adjusting mechanism comprises a screw rod and an adjusting knob, the front end of the screw rod is connected with the binding head, and the rear end of the screw rod is in threaded connection with the adjusting knob.

The safety mechanism comprises a safety rod and a pull piece, wherein the bottom of the safety rod is provided with a safety block, the top of the safety rod is provided with a pointer, the position of the binding instrument body corresponding to the pointer is provided with an indication window, the middle part of the safety rod is hinged on the inner wall of the binding instrument body, the safety rod is connected with a reset spring, and the reset spring enables the safety rod to have a tendency of anticlockwise rotation around a hinge point of the safety rod; the front end of the pull tab is divided into three pieces, the front end of the middle piece is provided with a drag hook, two pieces on two sides are arranged in a guide groove on the inner wall surface of the binding instrument body in a sliding mode, the tail of the pull tab is fixedly sleeved on the screw rod, and the drag hook is hooked on a boss of the safety lever in an initial state.

In use, in an initial state, the safety block on the bottom of the safety rod is abutted against the stop block in the shell, so that the handle cannot be pressed down to fire and is in an automatic safety state; in operation, the screw rod is driven to move towards the direction of the adjusting knob by rotating the adjusting knob, the screw rod drives the pull tab connected with the screw rod to move, and the drag hook on the pull tab pulls the boss on the safety lever so as to enable the safety lever to rotate clockwise around the hinging point of the safety lever, and the safety block on the safety lever is completely separated from the stop block in the handle shell, so that the safety lever is in a cockable state; when the handle is pressed down to trigger, the middle piece of the pull tab is pushed open by the lug on the handle and the pull tab is deformed, so that the drag hook on the pull tab is far away from the boss on the safety lever, the drag hook loses the limiting function on the safety lever, the handle is loosened after the trigger is finished, the safety lever can rotate anticlockwise under the action of the reset spring, and the safety block on the safety lever is propped against the stop block in the handle shell again, so that the handle cannot be pressed down, and the function of preventing secondary triggering is achieved.

However, in the anastomat, after the firing is completed, the pull tab is deformed and cannot be automatically reset, namely, the pull tab loses the function of driving the safety lever to rotate again, so that the safety block on the safety lever can continuously lean against the stop block in the shell, the anastomat is continuously in a safety state that the anastomat cannot be fired, the circular tube type binding instrument cannot be reused, the reliability of the circular tube type binding instrument cannot be detected in a mode of experimental firing before the operation, a firing process of failure occurs in the operation, and the potential safety hazard of operation failure is caused.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the firing equipment cannot be reused due to the secondary firing prevention device of the firing equipment in the prior art; and the safety hidden trouble caused by the incapability of carrying out experimental detection on the firing equipment before use.

To this end, the invention provides a firing apparatus comprising

A base frame;

a first moving member slidably disposed between a start position and an action position with respect to the base frame;

an operating member having an abutment point for applying a force to the first moving member toward the acting position;

the limiting piece is fixedly arranged on the base frame;

a second moving member that contacts the operating member, the second moving member constituting a fulcrum of the operating member;

the linkage part is movably arranged between a first position and a second position relative to the base frame; in the second position, the linkage part is used for releasing the limit of the limit part on the second moving part, the first moving part forms a fulcrum of the operating part, and the second moving part is in a moving state;

and the reset mechanism is used for driving the second moving part to be switched to the fixed state and driving the linkage part to be reset to the first position in the moving state.

Preferably, in the above firing device, one end of the operating member is hinged to the first moving member, and a first hinge point is formed on the first moving member;

the firing equipment further comprises a supporting rod, two ends of the supporting rod are respectively hinged to the operating component and the second moving component, and a second hinge point is formed on the second moving component;

in the fixed state, the second hinge point constitutes a fulcrum of the operating member; in the displaced state, the first hinge point constitutes a fulcrum of the operating member.

Further preferably, in the above firing device, a limiting area is formed on the second moving part; both ends of the linkage part are respectively in linkage arrangement with the first moving part and the second moving part;

in the fixed state, the limiting piece is inserted in the limiting area; in the second position, the linkage part drives the second moving part to be separated from the limiting part.

Further preferably, in the above firing device, a first channel extending along an axial direction of the second moving member is provided at one end of the second moving member, and an opening is formed at one end of the first channel, which is close to the first moving member;

A first protruding part is formed on the inner wall surface of the first channel in a protruding mode along the radial direction of the second moving part; and a concave area is formed between the other end of the first channel opposite to the opening and the first protruding part, and the concave area forms the limit area.

Further preferably, in the above firing device, in the first position, one end of the linkage member is overlapped on one end of the first moving member; in the active position, the end face of the one end of the linkage member is disengaged from the end face of the one end of the first moving member.

Preferably, the firing device further includes a second reset element, which applies a second biasing force to the second moving element, so that the limiting element is inserted in the limiting area in the fixed state;

the second moving part is provided with a first matching part, and the linkage part is provided with a second matching part; the first engaging portion engages with the second engaging portion through an inclined guide surface at which the linking member generates an urging force against the second biasing force.

Further preferably, in the firing device, a second protrusion is provided on an inner wall surface of the second moving member;

the outer wall surface of the linkage part, which is opposite to the second bulge, is provided with a concave part, a bulge part is correspondingly formed at least on one side of the concave part, which is close to the first motion part, and the concave part is in transitional connection with the bulge part through a third guide surface; the concave portion and the convex portion constitute the second fitting portion.

Further preferably, in the above firing device, a first base is provided on the base frame, and a second channel in the same direction as the first channel is provided on the first base; the second moving part is sleeved outside the first base, a movable space is formed between the second moving part and the first base, and the second resetting piece is installed in the movable space.

Further preferably, in the above firing device, a step surface and a first protrusion are formed on an inner wall surface of the second moving member, and the step surface and the first protrusion are in transitional connection through a first guide surface; the step surface and the first bulge form the first matching part;

in the first position, the other end of the linkage part is used as the second matching part to be lapped on the step surface; in the second position, the other end of the linking member is interposed between the first protrusion and the first base.

Further preferably, the firing device further includes a first reset member disposed on the base frame and abutting against the first moving member, and the first reset member applies a first biasing force to the first moving member toward one side of the second moving member.

Further preferably, the above-mentioned firing device, the reset mechanism comprises

A third reset piece which is arranged on the base frame and is abutted against the second moving part, and applies a third biasing force to the second moving part towards one side of the first moving part;

a first drive member slidably disposed between a third position and a fourth position relative to the base frame;

the stress piece is arranged on the outer wall surface of the linkage part; when the first driving piece slides towards the fourth position, the first driving piece applies a poking force to the stressed piece to drive the linkage part to return to the first position.

Further preferably, in the firing device, a side end surface of the force receiving member facing the first driving member is a second guide surface inclined from the first driving member to the first moving member;

when the first driving piece slides towards the fourth position, the first driving piece faces and abuts against the second guide surface.

Further preferably, the above firing device, the reset mechanism further includes a fourth reset member disposed on the second moving member or the base frame and abutting against the linkage member, and the fourth reset member applies a fourth biasing force to the linkage member toward the first position.

Further preferably, the firing device described above further comprises a third moving member slidably disposed between a third position and a fourth position relative to the base frame, the first drive being disposed on the third moving member.

The technical scheme of the invention has the following advantages:

the invention provides firing equipment which comprises a base frame, a first moving part, a limiting part, a second moving part, a linkage part and a reset mechanism. The firing equipment is initially in a triggerable state after the last firing; under the action of the linkage component, the rotating fulcrum of the operation component is converted into a first hinge point from a second hinge point, and the firing equipment is converted into a failure state from a triggerable state; under the effect of the reset mechanism, the rotating fulcrum of the operating part is converted into a second hinge point from a first hinge point, and the firing equipment is converted into a cockable state from a failure state, so that the firing equipment is alternately in the cockable state and the failure state, and the firing equipment cannot continuously perform twice firing, so that the firing equipment can be repeatedly utilized. In addition, before the firing equipment is used, the process of testing the firing of the firing equipment can be performed, and the reliability of the firing equipment is tested.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a firing device according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the front view of the firing device of FIG. 1 (with one side housing removed);

FIG. 3 is a schematic view of the firing apparatus of FIG. 1 in longitudinal cross-section;

FIG. 4 is an enlarged view of a portion of the firing apparatus provided with FIG. 3;

FIG. 5 is a schematic view of the firing device provided in FIG. 4 with the third moving component and the base removed;

FIG. 6 is a schematic illustration of the mating structure of a second moving component and a linkage component of the firing device provided in FIG. 4;

FIG. 7 is a schematic view of a second moving component of the firing device of FIG. 1;

FIG. 8 is a schematic view of the linkage components of the firing device of FIG. 1;

FIG. 9 is a schematic view of the first base of the firing device of FIG. 1;

FIG. 10 is a schematic view of the positioning block of the firing device of FIG. 1;

FIG. 11 is a schematic view in partial cross-section of a firing apparatus provided with embodiment 2 of the present invention;

FIG. 12 is a partial schematic front view of the firing apparatus of FIG. 11;

FIG. 13 is a schematic view of the linkage assembly of FIG. 12;

FIG. 14 is a schematic view of the structure of the barrier of FIG. 12;

FIG. 15 is a schematic view of the second base of FIG. 12;

fig. 16 is a schematic structural view of the positioning block in fig. 12.

Reference numerals illustrate:

1-a base frame;

2-a first moving part, 21-a first limiting part, 22-a second limiting part, 23-a first baffle plate and 24-a third limiting part;

3-an operating part, 31-a first hinge point, 32-a third hinge point;

4-limiting parts;

5-second moving part, 51-limit area, 511-first channel, 52-first mating part, 521-first protruding part, 5221-step surface, 5222-first protrusion, 523-first guiding surface; 524-fourth guide surface;

6-linkage part, 61-second mating part, 611-concave part, 612-convex part, 623-third guide surface;

71-a third restoring element, 72-a first driving element, 73-a stress element, 74-a second guiding surface, 75-a fourth restoring element;

8-a strut, 81-a second hinge point;

9-a first reset element;

10-a second reset element;

11-a first base, 111-a second channel, 112-a fourth limit part, 113-a second protrusion; 114-a first mounting portion; 115-a third channel; 116-a third mount; 117-a second mount; 118-guide slots; 119-mounting slots; 120-base chute;

12-third motion part, 121-yielding area;

13-a second drive member;

14-a cartridge module;

15-an anvil assembly;

161-second base, 1611-guide projection, 162-blocking member, 1621-second projection, 1622-bar aperture, 163-positioning block, 1631-body, 1632-post, 1633-slot, 1634-block, 164-abutment surface.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

The present embodiment provides a firing apparatus, as shown in fig. 1 to 8, including: the device comprises a base frame 1, a first moving part 2, an operating part 3, a limiting part 4, a second moving part 5, a linkage part 6 and a reset mechanism.

Wherein the first moving part 2 is slidably arranged between a starting position and an active position relative to the base frame 1; one end of the operating member 3 is hinged to the first moving member 2, a first hinge point 31 is formed on the first moving member 2, and the operating member 3 has a pivot point for applying a force to the first moving member 2 toward the acting position; the two ends of the supporting rod 8 are respectively hinged on the operating part 3 and the second moving part 5, a second hinge point 81 is formed on the second moving part 5, and a third hinge point 32 is formed between the supporting rod 8 and the operating part 3. The limiting member 4 is fixedly disposed on the base frame 1, and the second moving member 5 is disposed in a fixed state with respect to the base frame 1 by the limiting member 4.

The linkage part 6 is movably arranged between a first position and a second position relative to the base frame 1, and in the second position, the linkage part is used for releasing the limit of the limit part 4 on the second moving part 5, the second moving part 5 is converted from a fixed state to a moving state, and the first moving part 2 forms a rotating fulcrum of the operating part 3, so that the firing equipment is converted from a triggerable state to a failure state.

The reset mechanism comprises a third reset piece 71, a first driving piece 72, a stress piece 73 and a fourth reset piece 75; in the moving state, the second moving member 5 is driven to switch from the moving state to the fixed state, and the linkage member 6 is driven to return to the first position.

Specifically, by converting the rotation fulcrum of the operation member 3, the rotation fulcrum of the operation member 3 is converted from the second hinge point 81 to the first hinge point 31 under the action of the linkage member 6, and the firing device is converted from the cockable state to the failure state; under the action of the reset mechanism, the rotating fulcrum of the operating part 3 is converted into a second hinge point 81 from the first hinge point 31, and the firing equipment is converted into a cockable state from a failure state, so that the firing equipment is alternately in the cockable state and the failure state, and the firing equipment cannot continuously perform twice firing, so that the firing equipment can be repeatedly utilized. In addition, before the firing equipment is used, the process of testing the firing of the firing equipment can be performed, and the reliability of the firing equipment is tested.

In the following, a process of converting the firing device from the cockable state to the invalid state and from the invalid state to the cockable state in the present embodiment will be described in detail by taking the stapler as an example, and in order to express the positional relationship of each component, one end of any component close to the operator is named as a proximal end, and the end far away from the operator is named as a distal end.

The operating member 3 is preferably a handle, the first moving member 2 is preferably a push rod, the base frame 1 is preferably a housing, and the second moving member 5 is preferably a sliding sleeve. As shown in fig. 2, a first limiting portion 21 and a second limiting portion 22 are disposed on an inner wall surface of the housing, the second limiting portion 22 is located at a proximal end of the first limiting portion 21, for example, the second limiting portion 22 is an annular plate, a first baffle 23 is disposed on an outer wall surface of the proximal end of the first moving member 2, and in a starting position, the first baffle 23 abuts against the second limiting portion 22. The first restoring member 9 is sleeved on the first moving member 2, and has a distal end abutting against the first limiting portion 21, and a proximal end abutting against the first baffle 23, so as to apply a first biasing force to the first moving member 2 toward the second moving member 5. For example, the first restoring member 9 is a compression spring, a spring plate, a torsion spring, or the like having an elastic deformation.

As shown in fig. 1, 2 and 3, the firing apparatus further includes a third moving member 12, a cartridge module 14 and an anvil module 15. For example, the third movement member 12 is a screw, and a second driving member 13 is provided on the proximal end of the third movement member 12, and the distal end thereof extends distally through the second movement member 5. For example, the second driving member 13 is a knob which is threadedly engaged with the proximal end of the lead screw, and the operator drives the lead screw to extend in the distal direction or retract in the proximal direction by rotating the knob in a different direction. The anvil assembly 15 includes an anvil head and an anvil rod positioned within the interior cavity of the anvil head, the anvil rod being connectable to the distal end of the second moving member 5. For example, the anvil head has a conical shape.

As shown in fig. 1, the cartridge module 14 comprises a barrel fixed on the distal end of the base frame 1, and a nail pushing plate positioned in the barrel; the nail bin is arranged in the cylinder body along the axial direction of the cylinder body; and a plurality of staples are arranged in the circumferential direction of the staple cartridge. The proximal end of the first moving part 2 is hinged to the operating part 3, the distal end of which abuts against the proximal end of the ejector blade and can drive the ejector blade to move distally.

The switching of the pivot point of the operation member 3 is achieved by the action of the linkage member 6 and the return mechanism on the second moving member 5. The second moving part 5 is preferably a seat.

As shown in fig. 5 and 7, the second moving member 5 is provided with a stopper region 51 along the axial direction of the third moving member 12. The stopper 4 is fixed to the inner wall surface of the housing and inserted into the stopper area 51 so that the second moving member 5 is in the above-described fixed state.

As shown in fig. 3, 4 and 9, the housing is further fixedly provided with a first base 11, at least one first mounting portion 114 is provided on the first base 11, a receiving portion (not shown) is provided at a corresponding portion of the housing, and the first mounting portion 114 is located in the receiving portion, so that the first base 11 is fixedly disposed in the housing. The first base 11 is further provided with an axial third channel 115, and the distal end of the third moving member 61 extends outwardly through the third channel 115 of the first base 11 and the second moving member 4. The second moving part 4 is sleeved on the first base 11 and can slide relative to the first base 11; the first base 11 is provided with a second channel 111 extending along a radial direction, the second channel 111 extends to a distal end face of the first mounting portion 114 in a distal end direction, a base sliding groove 120 is provided at a position corresponding to the first mounting portion 114, and the second channel 111 is communicated with the base sliding groove 120; the first base 11 is radially provided with a second mounting portion 117, and a guide member 53 shown in fig. 8 is connected to the second mounting portion 117, specifically, the second mounting portion 117 is provided with a guide groove 118, the guide member 53 has a connecting portion 531 abutting against a wall surface of the second moving member 4, and a guide portion 532 formed on the connecting portion 531 and correspondingly disposed; the two sides of the guiding groove 118 are provided with mounting grooves 119, and preferably, the two mounting grooves 119 are symmetrically arranged relative to the guiding groove 118, and a second reset member (not shown) is disposed in the mounting grooves 119. Such that the guide 53 is movable in a radial direction with respect to the second mounting portion 117. The base 11, the guide 53 and the second restoring member form a base assembly.

The second restoring member applies a second biasing force to the second moving member 4 in a direction toward the second moving member 4 side. The second restoring member is preferably a compression spring, and the second restoring member and the operating member 31 are respectively located at both sides of the third moving member 61. The second restoring member is disposed between the base 11 and the connection portion 531. The second resetting piece is guided to slide in the guide groove 118 only, so that the movement reliability of the second moving part 4 is further ensured, and the limiting piece is ensured to be inserted in the limiting area in the initial state, so that the locking function of the second moving part 4 is realized.

Specifically, the base assembly is disposed on the third moving member 61, the second moving member 4 is slidably sleeved on the base assembly, a reserved moving space is formed between the second moving member 4 and the base 11 along the radial direction of the third moving member 61, and the second moving member 4 can be reset under the action of a second reset member in the base assembly without other forces.

Referring to fig. 5 and 7, which show structural diagrams of the second moving part 4, a hollow installation cavity communicating with the outside is provided in the second moving part 4, and first channels 511 along the axial direction are provided on inner wall surfaces of two sides of the installation cavity, wherein the first channels 511 and the second channels 111 are in the same direction; the distal end of the first channel 511 is an open port, the proximal end of the first channel 511 is a closed end, a limiting area 51 for the limiting piece 52 to move along the direction perpendicular to the axial direction is further provided on two side walls of the mounting cavity, the limiting area 51 is preferably a kidney-shaped groove, and the proximal end of the first channel 511 is terminated in the kidney-shaped groove and is communicated with the kidney-shaped groove. A first projection 521 is provided in the first passage 511, the first projection 521 starting from the distal end of the second moving member 4; the proximal end of the first projection 521 terminates at the distal wall of the kidney-shaped slot, i.e. the proximal end face of the first projection 521 forms part of the distal wall of the kidney-shaped slot; a recessed area is defined between the proximal end of the first channel 511 and the first projection 521, the recessed area forming the stop area 51 of the second moving part 4.

The distal end of the third moving part 12 sequentially passes through the first base 11 and the second moving part to extend outwards, and the second moving part 5 is sleeved on the first base 11; a reserved movable space is formed between the second moving member 5 and the first base 11 in the radial direction of the third moving member 12, so that the second moving member 5 has a movement component not only in the axial direction thereof but also in the radial direction. A second reset piece is also arranged in the movable space. Along the radial direction of the first base 11, two ends of the second restoring member are respectively arranged on the outer wall surface of the first base 11 and the inner wall surface of the second moving member 5, and the second restoring member applies a second biasing force to the second moving member 5, so that the limiting member 4 is inserted into the limiting region 51 in a fixed state.

The third moving part 12 is slidably disposed between a third position and a fourth position relative to the base frame, when the third moving part 12 slides, the limiting part 4 penetrating the first base 11 is prevented from blocking the movement of the third moving part 12, the third moving part 12 is provided with a yielding area 121 extending along the axial direction of the third moving part, for example, the yielding area 121 is a strip-shaped hole, the length of the strip-shaped hole limits the movement range of the third moving part 12 along the axial direction of the third moving part, and the limiting part 4 plays a role in guiding the movement of the third moving part 12. At this time, the limiting piece 4 passes through the yielding area 121 and the first base 11 and then is inserted into the limiting area 51, so that the firing equipment is in a cockable state. For example, the stopper 4 is a pin, and both ends of the pin in the radial direction of the third moving member 12 are fixed to the inner wall surface of the housing.

As shown in fig. 5 and 8, the linking member 6 has a certain elasticity, and in order to increase the elastic deformation of the linking member 6, a weight reducing hole extending in the axial direction may be formed in the linking member 6, so as to increase the deformation of the linking member 6 in the radial direction.

The first position of the linkage member 6 corresponds to the initial position, a third mounting portion 116 is disposed on a side of the first base 11 facing away from the second mounting portion 117, and the linkage member 71 is slidably disposed in the third mounting portion 116. The distal end of the linkage member 6 radially overlaps the proximal end of the first moving member 2, and the proximal end thereof is fitted to the inner wall surface of the second moving member 5; the linkage member 6 and the second restoring member are located on both sides of the first base 11 in the radial direction, respectively. In the active position, the end face of the distal end of the linkage member 6 is separated from and opposite to the end face of the proximal end of the first moving member 2, and the distance between the opposite end faces is smaller than the distance between the active position and the initial position, so that the linkage member is driven to retract towards the proximal end in the resetting process of the first moving member.

For a specific matching mode that the linkage member 6 drives the second moving member 5 to move, the inner wall surface of the second moving member 5 is provided with a first matching part 52, the linkage member 6 is provided with a second matching part 61, the linkage member 6 moves towards the second position, and the first matching part 52 is matched with the second matching part 61 through an inclined first guide surface 523.

For example, a step surface 5221 and a first protrusion 5222 are formed on the inner wall surface of the distal end of the second moving member 5, and the step surface 5221 and the first protrusion 5222 are in transitional connection through a first guide surface 523 inclined from the proximal end to the distal end; the step surface is close to the first moving part 2, and the step surface 5221 and the first boss 5222 form the first engaging portion 52; correspondingly, in the first position, the proximal end of the linkage member 6 is overlapped on the step surface 5221 as the second matching part 61, the end surface of the proximal end of the linkage member 6 is a first inclined surface, and the first inclined surface is abutted against and matched with the first guide surface 523;

when the link member 6 moves from the first position toward the second position, the proximal end of the link member 6 generates an urging force against the first guide surface 523 against the second biasing force, and the second moving member 5 is driven to move in a direction opposite to the second biasing force by the urging force; in the second position, the proximal end of the linkage member 6 is inserted into the gap between the first protrusion 5222 and the first base 11 to drive the second moving member 5 to move in a direction opposite to the second biasing force, disengaging the stop region from the stop.

As shown in fig. 3, 4 and 8, the reset mechanism includes a third reset element 71, a first driving element 72, a force receiving element 73 and a fourth reset element 75. Wherein the third resetting piece 71 is sleeved on the third moving part 12; a third limiting part 24, such as an annular plate, is also arranged on the inner wall surface of the shell; the proximal end and the distal end of the third restoring member 71 abut against the proximal end surfaces of the third limiting portion 24 and the second moving member 5, respectively, and the third restoring member 71 applies a third biasing force to the second moving member 5 in the direction toward the first moving member 2, so that the third moving member abuts against the proximal end surface of the mounting portion, and the third biasing force is smaller than the first biasing force, for example, the third restoring member is a spring. The first driving piece 72 is arranged on the third moving part 12 in a penetrating way along the radial direction and is positioned between the first moving part 2 and the second moving part 5; for example, the first driver 72 is a pin.

The force receiving member 73 is disposed on the outer wall surface of the linkage member 6 and located between the first driving member 72 and the first moving member 2, and the proximal end surface of the force receiving member 73 is a second guide surface 74 inclined from the proximal end toward the distal end. For example, the force receiving member 73 is an arc-shaped portion provided on both sides of the outer wall surface of the linking member 6, and the proximal end surface of the arc-shaped portion is an inclined second guide surface 74. When the third moving member 12 slides from the third position toward the fourth position, the first driving element 72 is aligned with the second guide surface 74 and applies an urging force to the second guide surface 74 toward the first position, and the entire linking member 6 is driven to move toward the first position, so that the proximal end of the linking member 6 slides out from the gap between the first protrusion 5222 and the base frame 1 and is returned to the stepped surface.

The fourth restoring member 75 is a spring, and a fourth limiting portion 112 protrudes radially outward from the distal end of the first base 11, for example, the fourth limiting portion 112 is an annular boss. The distal end and the proximal end of the fourth restoring member 75 abut against the force receiving member 73 and the fourth limiting portion 112, respectively. When the linkage member 6 is in the fourth position, the fourth reset element 75 applies a fourth biasing force to the linkage member 6 in the distal direction, and the fourth biasing force drives the linkage member 6 to move integrally in the distal direction, thereby assisting the action of the first driving element 72 and ensuring the in-place accuracy when the linkage member 6 resets the third position from the fourth position.

In the above embodiment, the limiting member 4 may be overlapped with the first driving member 72, and the first driving member 72 is used as the limiting member 4, where the limiting member 4 is not fixedly disposed on the base frame 1. As shown in fig. 7, the distal end surface of the first projecting portion 521 is a fourth guide surface 524 inclined from the distal end to the proximal end; when the third moving part 12 slides from the fourth position to the third position, the limiting piece applies a pressing force to the fourth guiding surface 524 of the distal end of the first protruding portion 521, so that the limiting piece 4 passes over the first protruding portion 521 and enters the limiting area 51, and the limiting piece 4 locks the second moving part, so that the second moving part 5 is in a fixed state, and the firing equipment is in a cockable state, so that the above-mentioned secondary firing preventing function can be realized.

In addition, it should be noted that, when the firing device is in the initial state, the first reset element 9 acts on the first moving component 2, so that the proximal end of the first moving component 2 abuts against the second limiting portion 22; meanwhile, the proximal end of the second movable member is in a fixed position due to the third restoring member 71. Since the operating member 3 is distally connected to said first moving member 2 by means of a first hinge point 31; connected at a proximal end to said second moving part 5 by a second hinge point 81; thus, in the initial state, the operating member 3 can maintain a stable opening angle by the first hinge point 31 and the second pivot point.

In this embodiment, under the cooperation of the linkage member 6, the reset mechanism and the limiting member 4, the specific process of switching from the cockable state to the invalid state and from the invalid state to the fixed state is as follows:

in use, when the firing device is to be fired, an operator is required to operate a knob, for example, rotate the knob counterclockwise, so that the third moving component 12 retracts from the distal end toward the proximal end, the anvil assembly 15 moves along with the third moving component 12 toward the distal end near the cartridge assembly 14, and the gap between the anvil assembly 15 and the cartridge reaches a preset value; the firing equipment is in a triggerable state, the second moving part 5 is in a fixed state, the limiting piece 4 is inserted in the limiting area 51, and the second hinge point 81 is a rotating fulcrum of the operating part 3; the distal end of the linkage member 6 is overlapped on the proximal end of the first moving member 2 in the radial direction, and the proximal end thereof is overlapped on the step surface in the second moving member 5; the proximal end and the distal end of the third restoring member 71 respectively abut against the third limiting portion 24 and the proximal end face of the second moving member 5; the distal end of the first reset element 9 abuts against the first limiting part 21, and the proximal end abuts against the first baffle 23; the first driving member 72 is located between the second moving member 5 and the first moving member 2. At this time, the operation knob is stopped, and only the operator presses the operation member 3, the operation member 3 can drive the proximal end of the first moving member 2 to extend in the distal direction, so as to push the staples in the staple cartridge to move toward the anvil assembly 15, and simultaneously compress the first reset member 9, and the first moving member 2 moves from the initial position to the action position, suturing two members located between the anvil assembly 15 and the cartridge assembly 14, and completing the whole firing process.

When the firing is completed, the distal end of the linkage member 6 is separated from the proximal end of the first moving member 2, and the distal end of the linkage member 6 deflects in the axial direction under the action of self-elastic force, and a gap exists between the end surface of the distal end of the linkage member and the end surface of the proximal end of the first moving member in the axial direction; the gap is smaller than the distance between the starting position and the active position of the first moving part 2; when the operating part 3 is released, the first moving part 2 moves towards the proximal direction to reset under the first biasing force of the first reset piece 9, and the end face of the proximal end of the first moving part 2 gradually approaches to and abuts against the end face of the distal end of the linkage part 6; the first moving member 2 drives the linkage member 6 to perform retracting movement from the distal end to the proximal end, the proximal end of the linkage member 6 applies an abutting force to the first guide surface 523, the abutting force is opposite to the direction of the second biasing force, so that the second moving member 5 as a whole moves in the radial direction opposite to the direction of the second biasing force, the limiting piece 4 is separated from the limiting area 51 in the radial direction thereof, the limiting piece 4 releases the limitation of the second moving member 5, and simultaneously, the fourth reset piece 75 is compressed; since the first biasing force of the first restoring member 9 is larger than the third biasing force of the third restoring member 71, the first hinge point 31 is fixed with respect to the second hinge point 81, and at this time, the rotation fulcrum of the operating member 3 is converted from the second hinge point 81 to the first hinge point 31, and when the operating member 3 is pressed, the operating member 3 drives the second moving member 5 to perform the retracting movement in the proximal direction, so that the stopper region 51 is staggered from the stopper 4 in the axial direction, while the second moving member 5 compresses the third restoring member 71. The second moving member 5 slides proximally and the proximal end of the linkage member 6 remains in the space between the first projection 5222 and the first base 11 such that the firing device is in a deactivated state.

At this time, the knob is turned again to drive the third moving part 12 to move towards the distal direction, two ends of the first driving piece 72 on the third moving part 12 are respectively opposite to and abutted against one second guiding surface 74, so that the linkage part 6 has a motion component in the axial direction and the radial direction, the distal end of the linkage part 6 is driven to be lifted and abutted against the proximal end of the first moving part 2 again, the proximal end of the linkage part slides out from a gap between the first protrusion 5222 and the first base 11 and is in reset lap joint with the step surface, and the linkage part 6 is reset to the first position; at this time, the proximal end of the linkage member 6 has no pressing force on the second moving member 5, and under the action of the second biasing force, the second moving member 5 is reset, so that the limiting member 4 is inserted into the limiting area 51, the limiting member 4 applies a limiting force to the second moving member 5, the limiting force is greater than the first biasing force, the second hinge point 81 is fixed relative to the first hinge point 31, so that the rotation fulcrum of the operation member 3 is converted from the second hinge point 81 to the first hinge point 31, the firing equipment is in a cockable state again, and further, the cockable state and the failure state of the firing equipment are alternately converted, and the firing equipment can be repeatedly utilized.

Example 2

The present embodiment provides a firing apparatus, which is different from the firing apparatus described in embodiment 1 in that: the structure of the linkage member 6 is different from that of the second moving member 5.

As shown in fig. 12, the second moving member 5 includes a second base 161 and a stopper 162. Wherein, on the base frame 1, the second base 161 slides along the axial direction thereof, the blocking member 162 is slidably disposed on the second base 161 along the radial direction of the second base 161, and the strut 8 is hinged on the second base 161. That is, the sliding of the second moving member 5 in the embodiment 1 in the axial direction and the radial direction thereof is distributed to the second base 161 and the stopper 162 in the present embodiment, respectively. Correspondingly, the limit region 51, the matching relationship between the linkage member 6 and the second moving member 5, and the setting position of the fourth reset element 75 are also different.

As shown in fig. 12, the limiting area 51 is formed by a limiting channel 511 and a blocking member 162 which are formed on the distal end portion of the second base 161, wherein the distal end of the limiting channel extends to the distal end face of the second base 161, i.e. the distal end of the limiting channel is open, for example, the limiting channel is a long waist hole with an open mouth.

The blocking member 162 is a generally "U" shaped ring, and the blocking member 162 is radially sleeved on the distal end of the second base 161; the blocking member 162 is provided with a second channel 111 in the same direction along the axial direction thereof, which is adapted to the limiting channel, and two side walls of the second channel 111 are correspondingly formed to form second protrusions 113; the proximal end surface of the second protrusion 113 is a supporting surface 164, and the supporting surface 164 acts on the limiting member 4 in the fixed state to block the limiting member 4 in the limiting channel, and the limiting region 51 is defined between the proximal end of the limiting channel and the proximal end of the blocking member 162.

In this embodiment, the reset structure of the blocking member 162 not only includes the second reset member 10 in embodiment 1, but also includes a positioning block 163, as shown in fig. 14, a vertical portion is disposed on the "U" shaped side wall of the blocking member 162, the vertical portion is provided with a bar hole 1622, and the positioning block is disposed through the bar hole 1622. The second restoring member 10 is disposed between the positioning block and the second moving part 54 in a radial direction, and applies a second biasing force to the blocking member 162 so that the blocking member 162 is restored without an external driving force.

As shown in fig. 16, the positioning block 163 includes a body 1631, a connecting post 1632 mounted on the body 1631, a connecting block 1634 formed at two ends of the body 1631, two clamping grooves 1633 formed on the connecting block 1634, and when two ends of the positioning block are mounted in two bar-shaped holes, the two clamping grooves 1633 on the positioning block are respectively matched with the two bar-shaped holes; the second restoring member 10 is sleeved on the connecting post 1632, and when the blocking member 162 slides on the second base 161, the positioning block moves along with the blocking member 162 in the elongated hole.

As shown in fig. 15, the second base 161 is provided with a guide projection 1611 extending in the axial direction thereof on the outer wall surface, and a long guide chute extending in the axial direction of the second base 161 is provided correspondingly on the inner wall surface of the housing, the guide projection 1611 being fitted into the guide chute, and when the second base 161 slides, the guide projection 1611 slides in the guide chute, thereby guiding the sliding of the second base 161.

As shown in fig. 11 to 14, the linking member 6 is a linking block, and the linking member 6 is fitted to the stopper 162, and both ends thereof are provided in association with the first moving member 2 and the second base 161, respectively. Specifically, as shown in fig. 12 to 14, the linking member 6 has a certain elasticity, the linking member 6 is provided to pass through the stopper 162, and the inner wall surface of the stopper 162 is provided with a second protrusion 1621 protruding in the sliding direction thereof; the outer wall surface of the linkage member 6 facing the second protruding portion 1621 is provided with a concave portion 611, a protruding portion 612 is formed on one side of the linkage member 6 close to the first moving member 2, the linkage member 6 and the protruding portion 612 are in transitional connection through an inclined third guiding surface 623, and the first guiding surface 523 is inclined towards the distal direction. For example, the second protrusion 1621 is a hemisphere, is located at the center of the bottom of the "U" shape and faces the opening of the blocking member 162, and the recess 611 is an arc-shaped groove.

As shown in fig. 11 and 12, in the first position, the proximal end of the linkage member 6 is slidably disposed on the second base 161, and the distal end of the linkage member 6 overlaps the proximal end of the first moving member 2; in the second position, the end face of the distal end of the linkage member 6 abuts against the end face of the proximal end of the first moving member 2. The distal end of the second base 161 is provided with a fourth limiting portion 112, the fourth reset element 75 is sleeved on the fourth limiting portion 112, the proximal end of the fourth reset element is abutted against the second base 161, and the distal end of the fourth reset element is abutted against the proximal end of the linkage member 6.

The firing device in this embodiment is used in a similar manner to that of embodiment 1, except that:

starting: the distal end of the linkage member 6 overlaps the proximal end of the first moving member 2, and the proximal end thereof overlaps the second base 161 and abuts the distal end of the fourth restoring member 75; the recess 611 of the linkage member 6 abuts the second projection 1621 of the blocking member 162.

During the use process: the firing process is the same as that in example 1. During the return of the first moving part 2 from the active position to the starting position, the difference is that: the first moving member 2 drives the linkage member 6 to perform a retracting movement from the distal end to the proximal end, the proximal end of the linkage member 6 compresses the fourth restoring member 75, the position on the linkage member 6 cooperating with the second protrusion 1621 gradually slides from the recess 611 to the third guide surface 623 and finally slides to the protrusion 612, and the third guide surface 623 of the linkage member 6 applies an abutment force to the second protrusion 1621, so that the limiting member 4 is disengaged from the limiting region 51 in the radial direction thereof.

The resetting process of the second moving member 5 is identical to that in embodiment 1, but in the resetting process of the linking member 6, the difference is that: turning the knob to drive the third moving member 12 in the distal direction, under the fourth biasing force of the fourth restoring member 75, the linkage member 6 toward the first position; simultaneously, two ends of the first driving piece 72 on the third moving part 12 are opposite to and abut against a second guiding surface 74 respectively, so that the linkage part 6 has motion components in the axial direction and the radial direction, the distal end of the driving linkage part 6 is lifted and abuts against the proximal end of the first moving part 2 again, the position where the linkage part 6 is matched with the second protruding part 1621 is gradually transited to the first guiding surface by the protruding part 612 and finally slides to the recessed part 611, and the linkage part 6 is reset to the first position; at this time, the proximal end of the linkage component 6 has no pressing force on the second moving component 5, and under the action of the second biasing force, the blocking piece 162 moves radially towards the limiting piece 4, so that the limiting piece 4 is inserted into the limiting area 51, and the firing equipment is in a cockable state again, so that the alternating conversion between the cockable state and the failure state of the firing equipment is realized, and the firing equipment can be repeatedly utilized for many times.

As a first alternative of embodiment, the firing device may also be provided without the fourth reset element 75, with the linkage member 6 being reset to the second position by simply toggling the force-bearing member 73 by the first drive member 72.

Example 3

The present embodiment provides a firing device that differs from the structure provided in the embodiment only in that the cartridge module 14 and anvil head may be of other shapes, the specific configuration being determined by the environment of use, e.g., the housing and cartridge may be of a tubular configuration with a curvature that is more suitable for extending into the interior of tubular tissue.

As a further alternative embodiment, the whole nail anvil is a bell structure, the opening of the bell structure is positioned at the far end and is suitable for being sleeved on the glans, and the firing equipment is a circumcision anastomat.

Example 4

The present embodiment provides a firing apparatus that differs from the structure of the firing apparatus provided in the embodiment only in that,

the firing device may be other than an intraoperative stapler, such as a pistol, air gun, or toy pistol, among others. At this time, the third moving member 12, anvil assembly 15, cartridge assembly 14, driver, and other structures specific to the stapler may not be provided in the corresponding firing device.

The sliding of the first driving member 72 is driven by other means, for example a telescopic cylinder is provided to drive the sliding of the limiter 4 between the first and second positions.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A firing apparatus comprising

A base frame (1);

a first moving part (2) slidably arranged between a starting position and an active position with respect to the base frame (1);

an operating member (3) having an abutment point for applying a force to the first moving member (2) toward the acting position; characterized in that it also comprises

The limiting piece (4) is fixedly arranged on the base frame (1);

a second moving member (5) that is in contact with the operating member (3), the second moving member (5) constituting a fulcrum of the operating member (3);

a linkage member (6) movably disposed between a first position and a second position with respect to the base frame (1); in the second position, the linkage part is used for releasing the limit of the limit part (4) on the second moving part (5), the first moving part (2) forms a fulcrum of the operating part (3), and the second moving part (5) is in a moving state;

And the reset mechanism is used for driving the second moving part (5) to be switched to a fixed state and driving the linkage part (6) to be reset to the first position in the moving state.

2. Firing device according to claim 1, characterized in that one end of the operating member (3) is hinged on the first moving member (2), forming a first hinge point (31) on the first moving member (2);

the firing equipment further comprises a supporting rod (8), two ends of the supporting rod are respectively hinged to the operating component (3) and the second moving component (5), and a second hinge point (81) is formed on the second moving component (5);

in the fixed state, the second hinge point (81) constitutes a fulcrum of the operating member (3); in the displaced state, the first hinge point (31) forms a fulcrum for the operating member (3).

3. Firing device according to claim 2, characterized in that the second movement part (5) is provided with a limit area (51); both ends of the linkage part (6) are respectively in linkage arrangement with the first motion part (2) and the second motion part (5);

in the fixed state, the limiting piece (4) is inserted into the limiting area (51); in the second position, the linkage part (6) drives the second moving part (5) to be separated from the limiting piece (4).

4. The firing equipment according to claim 3, characterized in that a first channel (511) extending along the axial direction of the second moving part (5) is formed on one end of the second moving part, and an opening is formed on one end of the first channel (511) close to the first moving part (2);

a first protrusion (521) is formed on the inner wall surface of the first passage (511) in a protruding manner in the radial direction of the second moving member (5); a concave area is formed between the other end of the first channel (511) opposite to the opening and the first convex part (521), and the concave area forms the limit area (51).

5. The firing device according to claim 4, characterized in that in the first position one end of the linkage member (6) overlaps one end of the first moving member (2); in the active position, the end face of the one end of the linkage member (6) is disengaged from the end face of the one end of the first moving member (2).

6. The firing apparatus of claim 5 wherein the firing device comprises a firing cartridge,

the device also comprises a second reset piece (10) which applies a second biasing force to the second moving part (5) so that the limiting piece (4) is inserted into the limiting area (51) in the fixed state;

The second moving part (5) is provided with a first matching part (52), and the linkage part (6) is provided with a second matching part (61); when the linkage member (6) moves toward the second position, the first engaging portion (52) engages with the second engaging portion (61) through an inclined guide surface, and the linkage member (6) generates an urging force at the guide surface against the second biasing force.

7. The firing device according to claim 6, characterized in that a second protrusion (1621) is provided on an inner wall surface of the second moving part (5);

a concave part (611) is formed on the outer wall surface of the linkage part (6) opposite to the second convex part (1621), a convex part (612) is correspondingly formed on at least one side of the concave part (611) close to the first moving part (2), and the concave part (611) is in transitional connection with the convex part (612) through a third guide surface (623); the concave portion (611) and the convex portion (612) constitute the second fitting portion (61).

8. The firing equipment according to claim 6, characterized in that a first base (11) is arranged on the base frame (1), and a second channel (111) which is in the same direction as the first channel (511) is arranged on the first base (11); the second moving part (5) is sleeved outside the first base (11) and forms a movable space with the first base (11), and the second resetting piece (10) is installed in the movable space.

9. The firing device according to claim 8, wherein a step surface (5221) and a first protrusion (5222) are formed on an inner wall surface of the second moving member (5), and the step surface (5221) and the first protrusion (5222) are in transitional connection through a first guide surface (523); the step surface (5221) and the first projection (5222) constitute the first fitting portion (52);

in the first position, the other end of the linkage member (6) is overlapped on the step surface as the second matching part (61); in the second position, the other end of the linking member (6) is interposed between the first protrusion (5222) and the first base (11).

10. The firing device according to any one of claims 1-9, further comprising a first return member (9) arranged on the base frame and abutting against the first moving member (2), the first return member (9) exerting a first biasing force on the first moving member (2) towards one side of the second moving member (5).

11. The firing device according to claim 10, characterized in that said return mechanism comprises a third return element (71) arranged on said base frame (1) and resting against said second moving part (5) and exerting a third biasing force on said second moving part (5) towards one side of said first moving part (2);

A first drive member (72) slidably arranged between a third position and a fourth position relative to the base frame (1);

a force receiving member (73) provided on the outer wall surface of the linking member (6); when the first driving piece (72) slides towards the fourth position, the first driving piece applies a poking force to the stressed piece (73) to drive the linkage part to return to the first position.

12. The firing device according to claim 11, wherein a side end surface of the stress member (73) facing the first driving member (72) is a second guide surface (74) inclined from the first driving member (72) to the first moving member (2);

when the first driving piece (72) slides towards the fourth position, the first driving piece (72) faces and presses against the second guide surface (74).

13. The firing apparatus of claim 11, wherein the reset mechanism further comprises a fourth reset member (75) disposed on the second moving member (5) or base frame (1) and abutting against the linkage member (6), the fourth reset member (75) applying a fourth biasing force to the linkage member (6) toward the first position.

14. The firing apparatus according to claim 11, further comprising a third moving member (12) slidably disposed between a third position and a fourth position relative to the base frame (1), the first driver (72) being disposed on the third moving member (12).